I don't recall if these are those trees, but I do know there's a group of trees that require a thunderstorm to get by. You wait for lightning to strike and then move onto that section of the road.
That's Sercerezo Hill. That screen (Daily Road) is called Daily Road because the availability of the different paths changes day by day. Keep checking that screen day by day and see what changes--that particular path should open up at some point during the week, no special unlocks required.